Products & Services

Description:
GEAFOL Cast-Resin Transformers have been in successful service since 1965. Many licenses have been granted to major manufacturers throughout the world since then. Over 100,000 units have proven themselves in power distribution or converter operation all around the globe.
Rated power of Cast-Resin

Description:
Dynapower Company is pleased to offer the ULTRACAST line of cast coil transformers, designed for applications that demand high reliability and continuous performance. Developed in the United States, the ULTRACAST process locks the windings in a very strong, high dielectric, epoxy resin, thus

Description:
The cast coil transformer is a low-noise, low-loss, castresin dry-type transformer. The high-voltage (HV) winding with copper conductors and the low-voltage (LV) winding with either copper conductors or copper sheet are wound and reinforced by glass-fiber and then cast with resin under vacuum

Description:
Abstract
Electrical, mechanical, and safety requirements of ventilated, non-ventilated, and sealed dry-type distribution and power transformers or autotransformers (single and polyphase, with a voltage of 601 V or higher in the highest voltage winding) are described.

Description:
This Standard applies to single- and 3-phase dry-type transformers, including those with cast or resin encapsulated coils, that are within the limits of the electrical ratings listed in Clauses 7.2 and 7.3, and that are intended for use in accordance with the service conditions for dry-type

Description:
Temperature monitoring unit for oil insulated type transformers. The T-N12 series of temperature controllers are available in 3 different models. Each model is designed for a specific application. The T-N12 series is ideal for up to 3 thermal alarm channels for the temperature control of castresin

Description:
The technical data 1．1 The current transformer can keep working at rated current of 1．1 multiple． 1．2 Power frequency testing voltage：beween the primary and secondary to earthing of voltage 42KV for duration of 5 minutes and the secondary to earthing of voltage 2K

Description:
BCT’s are designed for indoor (taped) and outdoor (castresin) metering and relaying applications for high voltage circuit breakers and power transformers. BCT’s are designed to customer specifications. All designs are rated 600 (IEEE) or 720 (IEC) volts. Available in 5 and 1 amp

Description:
PTE-36977 ™ is a two-component epoxy designed for encapsulation or casting of high voltage coils and transformers where high temperature, high voltage, and high thermal conductivity are required. PTE-36977 ™ is heat stable up to 150°C.

Wind turbines require a compact and high power transformer solution in order to provide the maximum output with the smallest weight. In the past most wind turbines which had on board transformers utilised castresin technology. However, increases in power ratings and higher voltages have meant

Heathrow airport is one of the world's busiest hubs, serving millions of customers a year. Throughout the airport there are distribution transformers providing power for critical services. Originally all these transformers were castresin but there were some problems which prompted the user to look

Modern practice with cast resin transformers of this design is to incorporate coarse weave glass fibre matt reinforcing material into the inner and outer walls of the coils, thus allowing the thickness of resin to be reduced, hence reducing the resin content...

Modern practice with cast resin transformers of this design is to incorporate coarse weave glass fibre matt reinforcing material into the inner and outer walls of the coils, thus allowing the thickness of resin to be reduced, hence reducing the resin content...

As shown in Fig. 1, a high-voltage-coil set of the cast resin transformer comprises an iron core formed by a plurality of
stacked silicon steel sheets and wound with wires to form
three high-voltage coils.

Summary
It is crucial for proper insulation design of cast resin transformers to consider voids and delamination which might exist in cast molding because of several surface boundaries between resin and conductor.